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65 lines
1.1 KiB
65 lines
1.1 KiB
package v2
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import (
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"github.com/Workiva/go-datastructures/queue"
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)
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// Event is the type that can be added to the priority queue.
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type Event queue.Item
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type priority interface {
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Compare(other queue.Item) int
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Priority() int
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}
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type priorityLow struct{}
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type priorityNormal struct{}
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type priorityHigh struct{}
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func (p priorityLow) Priority() int {
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return 1
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}
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func (p priorityNormal) Priority() int {
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return 2
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}
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func (p priorityHigh) Priority() int {
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return 3
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}
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func (p priorityLow) Compare(other queue.Item) int {
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op := other.(priority)
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if p.Priority() > op.Priority() {
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return 1
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} else if p.Priority() == op.Priority() {
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return 0
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}
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return -1
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}
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func (p priorityNormal) Compare(other queue.Item) int {
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op := other.(priority)
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if p.Priority() > op.Priority() {
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return 1
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} else if p.Priority() == op.Priority() {
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return 0
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}
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return -1
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}
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func (p priorityHigh) Compare(other queue.Item) int {
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op := other.(priority)
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if p.Priority() > op.Priority() {
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return 1
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} else if p.Priority() == op.Priority() {
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return 0
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}
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return -1
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}
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type noOpEvent struct {
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priorityLow
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}
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var noOp = noOpEvent{}
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